Chantel, I think you said you have an AW profile - if you have, did you tick the 'Car Meets' or 'Dogging' boxes when you filled your profile in? Not that it matters, but they're really not a good idea and I don't think there's many ladies here who would risk them - I've been working for nine years (and I started off working the hotel bars with a friend) and I would no more meet some stranger in a car than I would meet him in the middle of the woods.
Apart from anything else you would be breaking the law and assuming that the 1% chance of him being genuine actually comes good, if you are caught you could be arrested and prosecuted. He could also steal your phone and bag and dump you in the middle of nowhere, drive you off to some secluded spot where six (or just one) of his mates are waiting, or just refuse to pay you once you got to wherever it was.
I'm inclined to think this is a timewaster since (as Cat said) 2 hours for a car meet is ridiculous; have you read through the threads on the forum about first starting off on Adultwork? They have a feature which send alerts out to anybody who registers telling them when somebody new appears and this is when all the usual suspects crawl out from under their stones and try their luck because they know you won't be as wise to them as the experienced ladies.
Either way, not good. We can't make you not go if you intend to, but for God's sake if you do take somebody you trust with you to call in with, wait for you and most importantly take down the vehicle details, and make sure you have a well hidden second phone too.